When I first installed Skyrim on my computer and installed mods, I tried an ENB, But killed my framerate. I uninstalled it. But after doing some research I learned about adjusting Skyrimprefs and such. I can now run my mods and project enb with SSAO on at 30-40 FPS outside. Disable AF and AA in skyrim setting and use ENB for that. Also project ENB I am using uses Sweetfx and you can use AA for that. I disable Vsync and use Nvidia Inspector to lock my FPS at 59 or you can use the ENB to lock FPS. You can change the Primary and Secondary Resolutions in the Skyrimprefs will help as well. Also before using an ENB playing in Windowed Mode was better for performance. Now using ENB I get better performance not using windowed mode. If you end up using an ENB disable the SSAO, DOF and Reflections. Skylighting is a big hitter as well.